No his origin is still unknown

I personally think at least the Red Hood and chemicals part is true

The rest is a total mystery

Nobody knows. The Red Hood/bath in chemicals one is probably the most likely one, or at least the most accepted.

He had some Possible Origins

That’s what really makes him special. Nobody knows where he came from, and every story he tells actually makes him out as an unreliable narrator.

He one of my favorite dc villains

Mine too. Also who doesn’t love Heath Ledgers version?